The Last Enemy (2008)

Set in a near-future United Kingdom beset by terrorism and illegal immigration, it features the introduction of "TIA" , a centralised database that can be used to track and monitor anybody effectively by putting all available government information in one place. The story deals with a political cover-up centred around a rogue batch of vaccine that seems to be causing a deadly virus, as well as the moral, social and privacy concerns of such a system in a post-7/7 world. The story is told through the eyes of a mathematical genius, Stephen Ezard, who is portrayed as a recluse and showing some signs of obsessive-compulsive disorder. The final episode then has a plot twist in which this apparent virus is shown to be in fact an ethnicity-specific side effect of an experiment in producing an internal, injected and unfakeable bio-tag, a side-effect, which affects Arabs, but not Caucasians, and so has had to be shut down.